Hide Live Photo folder entirely from UI

ExifFilter.isHiddenFolder(): returns true for 'Live Photo' folder.
buildFolderList: filters hidden folders before building FolderInfo list.
Live Photo MOVs are now completely invisible — the LIVE badge on the
HEIC is the only signal needed. No placeholder thumbnails in the panel.

src/main/kotlin/com/bolenpad/photophetch/ui/AppState.kt

@@ -296,6 +296,7 @@ class AppState(private val configStore: ConfigStore) {
         val zoneId = java.time.ZoneId.systemDefault()
         return photos
             .groupBy { it.sourceFolder }
+            .filterKeys { !ExifFilter.isHiddenFolder(it) }  // hide Live Photo MOV folder
             .map { (name, folderPhotos) ->
                 val dates = folderPhotos.map {
                     it.dateTaken.atZone(zoneId).toLocalDate()

src/main/kotlin/com/bolenpad/photophetch/ui/BrowseScreen.kt

@@ -134,7 +134,8 @@ fun BrowseScreen(state: AppState) {
 
 private fun buildFolderSections(pl: PhotoListState.Loaded): List<FolderSection> {
     val zoneId = ZoneId.systemDefault()
-    return pl.folders.map { folder ->
+    return pl.folders  // already filtered by buildFolderList (no hidden folders)
+        .map { folder ->
         val photos = pl.all
             .filter { it.sourceFolder == folder.name }
             .sortedByDescending { it.dateTaken }

src/main/kotlin/com/bolenpad/photophetch/util/ExifFilter.kt

@@ -114,6 +114,14 @@ object ExifFilter {
                screenshotFilePrefixes.none { lower.startsWith(it) }
     }
 
+    /**
+     * Folders that should be completely hidden from the UI (not even in Other).
+     * Live Photo companions are proven by the LIVE badge on the HEIC — showing
+     * the MOVs separately adds noise with unverifiable placeholder thumbnails.
+     */
+    fun isHiddenFolder(folderName: String): Boolean =
+        folderName == "Live Photo"
+
     /**
      * Returns photos that are HEIC files (and not Live Photo motion clips).
      * Used to determine whether to show the HEIC conversion warning.